| 摘要 |
PROBLEM TO BE SOLVED: To provide technical means for adjusting acoustic in an acoustic space to the one that is comfortable to human ears even when the transmission characteristic of the acoustic space changes in time.SOLUTION: Inside the housing 10 of an acoustic structure 1 are accommodate a belt part 20, a roller 54, a belt-receiving part 58, intermediate boards 31-34, and a motor 52. The belt part 20 is a flexible belt forming a continuous ring as a whole. The belt part 20 is stretched by the roller 54 and the belt-receiving part 58 inserted into the inside thereof. A portion of the belt part 20 is exposed to the outside through an opening in the housing 10. The inside space of the belt part 20 is divided by the intermediate boards 31-34, forming a plurality of acoustic mediums 30. The belt part 20 is provided with an opening 22 corresponding to each acoustic medium 30. The motor 52 rotates the roller 54, causing the belt part 20 to rotate. The openings 22 move together in the same direction by the rotation of the belt part 20.SELECTED DRAWING: Figure 1 |
